Debates over slavery in what u. s. region played a role in the sectional crisis, for as the u. s. pushed to acquire new land after the american revolution, questions arose regarding whether new lands ought to be slave or free?

After the Louisiana Purchase, new states in the north became free states, for example: Ohio and Michigan, while southern states continue to employ slavery, for example, Alabama and Mississippi.

Controversy arose when Missouri was about to become a slavery state. The reason is that Missouri, while considered a southern state to this day, it's objectively somewhat northernly, and some congressmen from the North thought it should be a free state. (Others obviously thought that slavery was immoral and should be abolished in all states, but no one until Lincoln would do that).

An agreement, known as the Missouri compromise was achieved. Missouri was allowed to become a slavery state and enter the union, at the same time that Maine became a free state and entered the union. This kept the power balance between North and South.

Besides, all new territories south of the  36° 30' parallel were allowed to have slavery, while territories north of the line were to be free states.

the process is called revolution because it was a process of great economic-social transformations that began in england in the xviii century.

the industrial mode of production spread throughout much of the northern hemisphere throughout the xix and early xx centuries.

the effect of this revolution was the distance between the countries, with respect to economic and political power.   after all, not all industrialized at the same time, remaining in the condition of suppliers of raw materials and agricultural products to the industrialized countries.

these differences mark to this day the nations of the world that are divided between developed and developing countries. one way to measure whether a country is advanced is to assess how industrialized it is.

on the whole, dickens has shown the french revolution and its this site might you. good at his job, and the subject matter he chose,